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26 11 000 Removing and installing complete propeller shaft (flexible disc at rear)

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Special tools required: 

IMPORTANT: On all-wheel drive vehicles with defective, non-engaging drive, it is imperative that the following information is taken account of: 
IMPORTANT:

The three-hole flange to the rear axle differential is balanced with the flexible disc and propeller shaft.

Three-hole flange, flexible disc and propeller shaft may not  be disassembled.

The propeller shaft may only  be released at the sunk nut at the rear.

The recessed nut must be opened in clockwise direction. 

Replacement of the sunk nut on the rear axle differential is mandatory! 

The sunk nut already has a screw locking.

After the propeller shaft has been screwed into the rear axle final drive (sunk nut), a hardening time of at least 2 hours  is absolutely necessary.

The hardening time may be extended at lower temperatures!

Failure to comply with these instructions may cause serious damage!

Necessary preliminary tasks: 

IMPORTANT: Adhere to installation and screw-fastening sequence.

Installation sequence:

  1. Join propeller shaft to transmission.
  2. Join propeller shaft to rear axle final drive.
  3. Join center mount.

Screw-fastening sequence:
  1. Flexible disc to transmission
  2. Three-hole flange on rear axle differential
  3. Center mount
IMPORTANT: To avoid buzzing sound after refitting the propeller shaft:
  1. The flexible disc connection (1) on the front at the propeller shaft must  be marked in one plane with the flexible disc (2) and the three-bolt flange (3) before removal.
  2. During installation the three-bolt flange (3) must be forced back together again with the flexible disc (2) in the same position.
  3. Replace ZNS bolts and self-locking nuts.
    Fig 1: Identifying Flexible Disc, Connection And Three-Bolt Flange
    G08488082Courtesy of BMW OF NORTH AMERICA, INC.

If necessary:

Release screws (1).

Remove cover (2).

Fig 2: Identifying Cover And Screws
G08488083Courtesy of BMW OF NORTH AMERICA, INC.

Loosen screws.

Installation note: 

NOTE:

Instead of conventional rubber flexible disks, F series also use

aluminum flexible discs, which are also called EGG (constant velocity joints).

Fig 4: Identifying Constant Velocity Joints
G08488085Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Check centering mount.

If necessary, replace damaged CENTERING BEARING .

Grease front centering bearing.

Installation note: 

Tighten down screws/bolts to specified torque.

Secure angle of rotation special tool 00 9 120 with magnets 00 9 130 to vehicle underbody and screw down further according to angle of rotation.

Tightening torque 26 11 1AZ .

Fig 6: Securing Angle Of Rotation Special Tool (00 9 120) With Magnets (00 9 130) To Vehicle Underbody
G04751857Courtesy of BMW OF NORTH AMERICA, INC.

With N63 engine:

Release screws (1).

Remove panel (2).

Fig 7: Identifying Panel With Mounting Screws
G06894868Courtesy of BMW OF NORTH AMERICA, INC.

Slacken screws (1)

Tightening torque 26 11 5AZ .

Using a suitable tool (2), secure propeller shaft at center universal joint against turning.

Remove screws of center mount fully only after opening insert nut.

Fig 8: Securing Propeller Shaft At Center Universal Joint Against Turning Using Suitable Tool
G04794211Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

With N53, N54, N55, N57 engines:

Propeller shaft center bearing (1) is identified with the labelling "TOP".

Propeller shaft center bearing (1) must be installed with the labelling facing upward in transmission tunnel.

Fig 9: Identifying Propeller Shaft Center Bearing Labelling TOP
G06894870Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT:

The bi-hexagonal flange nut (1) must not be used for counter-hold. 

Failure to comply with this instruction may result in serious damage to the rear axle final drive.

IMPORTANT:

The sunk nut must be opened clockwise - see direction of arrow. 

Turning the recessed nut in counter-clockwise direction will automatically tighten the recessed nut further and significantly damage the bi-hexagonal flange nut.

If the insert collar of the flange nut was damaged, the propeller shaft can no longer  be secured using a new sunk nut and the rear axle differential must be replaced.

Release sunk nut in clockwise direction  with special tools 33 5 070 and 33 0 080 (wrench).

Tightening torque 26 11 6AZ .

Fig 10: Releasing Insert Nut Using Special Tool (33 5 070 And 33 0 080)
G08488092Courtesy of BMW OF NORTH AMERICA, INC.

Remove retaining clip (1) and gasket (2).

Installation note: 

Retaining clip and gasket must be replaced.

Fig 11: Identifying Retaining Clip And Gasket
G04794213Courtesy of BMW OF NORTH AMERICA, INC.

Remove insert nut (1).

Installation note: 

Insert nut must be replaced.

The sunk nut is equipped with a screw locking.

Prior to the first journey, a minimum hardening time of 2 hours  must be complied with.

Failure to comply with these instructions may cause serious damage!

Fig 12: Identifying Insert Nut
G04794214Courtesy of BMW OF NORTH AMERICA, INC.

Before installing propeller shaft:

Clean insert collar (1) on flange nut and gearing on bevel pinion (2).

Fill insert collar (1) with grease.

Specified grease: see DRIVESHAFT -- OPERATING FLUIDS .

Fig 13: Identifying Insert Collar On Flange Nut And Gearing On Bevel Pinion
G04794215Courtesy of BMW OF NORTH AMERICA, INC.

Clean thread (1) of joint hub to remove adhesive residues.

Clean hub teeth (2), then coat with grease.

Specified grease: see DRIVESHAFT -- OPERATING FLUIDS .

IMPORTANT: Thread of joint hub must not  be fouled with grease.
Fig 14: Identifying Joint Hub Thread And Hub Teeth
G04794216Courtesy of BMW OF NORTH AMERICA, INC.

Place flange nut (1) with gasket in insert collar of flange nut.

Install retaining clip (2).

Fig 15: Identifying Flange Nut And Retaining Clip
G04794217Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Adhere to installation and screw-fastening sequence.

Installation sequence:

  1. Join propeller shaft to transmission
  2. Join propeller shaft to rear axle final drive
  3. Join center mount

Screw-fastening sequence:
  1. Insert nut
  2. Flexible disc to transmission
  3. Center mount
IMPORTANT:

The bi-hexagonal flange nut (2) must not be used for bracing. 

Failure to comply with this instruction may result in serious damage to the rear axle final drive.

Insert nut must be screwed into place within 5 minutes. 

Slide propeller shaft (1) to the limit position onto insert nut and secure.

Secure propeller shaft at center universal joint with a suitable tool against turning.

Tightening torque 26 11 6AZ .

Fig 16: Sliding Propeller Shaft To Limit Position Onto Insert Nut
G08488098Courtesy of BMW OF NORTH AMERICA, INC.
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